Crabtree has added motion and passive infrared detectors to its existing range of electrical accessories and PIRs, thus providing electricians with the means to offer or add automation and energy savings to their customers’ installations. The new range is extremely easy to install using simple plug-in connectors and includes ceiling, wall and corridor occupancy detectors, and a state of the art PIR for other motion detection applications.
The unobtrusive flush mounted ceiling master motion sensor is capable of detecting occupancy in any room, allowing the convenience of automatic “ON/OFF” switching to any area that might have occasional use. Each sensor has a “TIME ON” control, adjustable from 30 seconds minimum to a maximum of 30 minutes. The sensor will reset the time interval whenever movement is detected, so while there is movement from a heat source in the detecting area, the light will remain on. There is also a sliding scale Lux setting, allowing the sensors to be active in response to ambient lighting conditions, adjustable as required.
To install the detectors, a power supply module is first connected to the local supply, this unit provides the switched output. A master sensor is then simply plugged into the power supply, with up to an additional five slave sensors able to be daisy chained to extend coverage. The “Plug ‘n Play” design means contractors don’t need to wire back from each additional sensor to the load, thus saving valuable installation time on site. This not only makes the system quick and easy to fit, but also the slave sensors give a great deal of flexibility, allowing the detection footprint to be tailored to each situation.
Each slave unit is supplied with a five metre plug-in extension lead, and if the maximum of six sensors are used, coverage of up to a massive 234 sq m. is possible
A single detection zone can also have multiple locations. The whole floor of a building, for example, can be operated as one zone with multiple sensors. This is ideal when one sensor cannot provide the required coverage as a result of room shape, the detection zone or the range limit of a single sensor. At a mounting height of 2.4 metres, the typical detection range of a master or slave occupancy sensor is 8 metres, with masks available to customise the detection zone. These detectors can switch loads of up to 1,800W for incandescent lighting or 1,100W for fluorescent and energy saving lamps.
Dedicated stand alone corridor motion sensors are also available, all fit into standard flush or surface boxes. Corridor sensors have a figure 8 detection zone with a reach of 24 metres and a 3 metre width, probably the widest detection range available on the market today. They can switch up to 1,000W for incandescent lighting, and up to 500W for fluorescent and energy saving lamps.
For further information about the new Crabtree occupancy sensor range contact Electrium Sales on 01543 455000 or go to www.electrium.co.uk/crabtree.